﻿////////////////////////////////////////////////////////////////////////////////////
//  CameraFilterPack v2.0 - by VETASOFT 2015 //////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////

Shader "CameraFilterPack/Edge_BlackLine" {
	Properties 
	{
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_TimeX ("Time", Range(0.0, 1.0)) = 1.0
		_Distortion ("_Distortion", Range(0.0, 1.0)) = 0.3
		_ScreenResolution ("_ScreenResolution", Vector) = (0.,0.,0.,0.)
	}
	SubShader 
	{
		Pass
		{
			ZTest Always
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma fragmentoption ARB_precision_hint_fastest
			#pragma target 3.0
			#pragma glsl
			#include "UnityCG.cginc"
			
			
			uniform sampler2D _MainTex;
			uniform float _TimeX;
			uniform float _Distortion;
			uniform float4 _ScreenResolution;
			
		       struct appdata_t
            {
                float4 vertex   : POSITION;
                float4 color    : COLOR;
                float2 texcoord : TEXCOORD0;
            };
 
            struct v2f
            {
                  half2 texcoord  : TEXCOORD0;
                  float4 vertex   : SV_POSITION;
                  fixed4 color    : COLOR;
           };   
             
  			v2f vert(appdata_t IN)
            {
                v2f OUT;
                OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
                OUT.texcoord = IN.texcoord;
                OUT.color = IN.color;
                
                return OUT;
            }
           
			float4 frag (v2f i) : COLOR
			{
				float2 uv = i.texcoord.xy;

				float filter[25];
				
				for(int a = 0 ; a < 25 ; a++) {
					filter[a]=-1.;
				}
				filter[12]=24.;
					
				fixed4 color = 0;

				for(int a = 0 ; a < 5 ; a++) {
					for(int b = 0 ; b < 5 ; b++) {
						color += filter[a*5 + b] * tex2D(_MainTex, uv + float2(a-2,b-2)/100.);
					}
				}
				
				if((color.r+color.g+color.b)/3. < .8)
				{
					color = 0.;
				}
					
				return color;	
			}
			
			ENDCG
		}
		
	}
}